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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-9

  • question_answer
    The frequency 1057 MHz of radiation arising from two close energy levels in hydrogen belongs to

    A)  radio waves                      

    B)  infrared waves

    C)  microwaves                      

    D)  \[\text{ }\!\!\gamma\!\!\text{ -}\]rays

    Correct Answer: A

    Solution :

    \[f=1057MHz\] \[\lambda =\frac{c}{f}=\frac{3\times {{10}^{8}}}{1057\times {{10}^{6}}}m=28cm\] Which corresponds to radio waves                 


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